Acid Reflux

Overview

Acid reflux is the backward flow of stomach contents, including acid, up into the esophagus, the tube that carries food from the throat to the stomach. It commonly causes a burning sensation behind the breastbone known as heartburn, along with a sour or bitter taste and sometimes the feeling of food coming back up. Occasional reflux after a large or rich meal is very common and usually harmless.

A ring of muscle at the bottom of the esophagus normally keeps stomach acid where it belongs. When this muscle relaxes or weakens at the wrong time, acid escapes upward and irritates the esophageal lining. When reflux happens often, it may be diagnosed as GERD (gastroesophageal reflux disease). Frequent or severe reflux can affect quality of life and, over time, irritate the esophagus, so persistent symptoms deserve attention.

Reflux is often tied closely to habits and timing. Symptoms commonly appear after large or fatty meals, when bending over, or when lying down at night, because gravity no longer helps keep stomach contents down. Many people can connect their reflux to specific foods, drinks, or routines. Recognizing these personal triggers is one of the most effective first steps, since adjusting them often reduces symptoms without the need for stronger treatment.

Common Causes

Acid reflux happens when stomach acid flows back into the esophagus, which can be triggered or worsened by:

• Eating habits: Large meals, eating late at night, and lying down soon after eating.
• Trigger foods and drinks: Fatty or fried foods, spicy foods, chocolate, citrus, tomatoes, coffee, and alcohol.
• A weak lower esophageal muscle: Allowing acid to escape upward.
• Hiatal hernia: A hiatal hernia can make reflux more likely.
• Pressure on the stomach: From obesity, pregnancy, or tight clothing.
• Smoking and certain medications: Both can relax the esophageal muscle.

Stress does not directly cause reflux but can worsen the perception of symptoms.

Associated Symptoms

Acid reflux often comes with other symptoms:

• Heartburn, a burning feeling in the chest, often after meals or when lying down
• Regurgitation of food or sour liquid into the throat or mouth
• A sour or bitter taste
• Trouble or discomfort swallowing
• Chronic cough, sore throat, hoarseness, or a feeling of a lump in the throat
• Worsening symptoms at night

Reflux symptoms can overlap with heart problems. Chest pain with shortness of breath, sweating, or pain spreading to the arm or jaw should be treated as a possible heart emergency, not assumed to be reflux.

Diagnosis & Evaluation

Acid reflux is often diagnosed from the typical symptoms and their response to treatment. Further evaluation is considered when symptoms are frequent, severe, or have warning features:

• Symptom review and trial of treatment: Improvement with acid-reducing medicine supports the diagnosis.
• Upper endoscopy: A thin camera examines the esophagus and stomach to check for irritation or other causes.
• Acid (pH) monitoring: Measures acid levels in the esophagus over time.
• Other tests: Such as those assessing how the esophagus moves, when needed.

Testing is especially important for swallowing difficulty, weight loss, persistent symptoms, or bleeding.

Treatment & Management

Most reflux improves with lifestyle changes and, when needed, medication:

• Lifestyle measures: Eat smaller meals, avoid trigger foods, do not lie down for two to three hours after eating, raise the head of the bed, lose excess weight, and stop smoking.
• Antacids: For quick, short-term relief of occasional heartburn.
• Acid-reducing medicines: H2 blockers and proton pump inhibitors reduce stomach acid for more persistent symptoms, used as directed.
• Treating underlying issues: Such as a hiatal hernia when relevant.
• Surgery: Rarely needed, for severe reflux not controlled by other measures.

See a doctor before using acid-reducing medicines long term, and for any warning symptoms.

When to See a Doctor

See a doctor if you have reflux symptoms more than twice a week, if symptoms persist despite over-the-counter treatment, or if you have difficulty or pain swallowing, unintended weight loss, persistent vomiting, or signs of bleeding such as black stools or vomiting blood.

Seek emergency care for chest pain that comes with shortness of breath, sweating, lightheadedness, or pain spreading to the arm, neck, or jaw. Although reflux can cause chest discomfort, these features can signal a heart attack and should never be assumed to be heartburn.

Related Topics

Frequently Asked Questions

References

1. National Institute of Diabetes and Digestive and Kidney Diseases (NIDDK). Acid Reflux (GER & GERD).
2. Mayo Clinic. Gastroesophageal reflux disease (GERD).
3. MedlinePlus, U.S. National Library of Medicine. GERD.
4. American College of Gastroenterology. Acid Reflux.